Standard Ignition NS-623 Neutral Safety Switch

Neutral Safety Switch for Hyundai and Kia

Standard Ignition NS-623 is a 12V neutral safety switch built with a bolt-mount design, 8 male terminals, and one female rectangular connector. It is a direct-fit electrical switch for select Hyundai and Kia vehicles, including Hyundai Elantra, Sonata, Tucson, Accent, Kona, and Kia Soul, Rio, Forte, Optima, and Forte5 applications.

Key Features

• Part number: NS-623
• 12V electrical switch for transmission range and start-inhibit control
• Bolt-mount attachment method
• 8 male terminals with 1 female rectangular connector
• Black and silver finish with aluminum, plastic, and metal construction
• Length: 3.25 in. (82.55 mm)
• No mounting hardware included
• No gaskets included

Detailed Description

Standard Ignition NS-623 is a neutral safety switch used to help control starter engagement based on transmission position. It is built for select Hyundai and Kia models and uses a pin-style terminal layout with a rectangular connector for vehicle-specific electrical integration. This part number NS-623 cross-references 4270026000 and CSW520 for the same application. Compatible With Hyundai Elantra, Sonata, Tucson, Accent, Kona, Veloster, Elantra GT, and Kia Soul, Rio, Forte, Optima, Forte Koup, Forte5, and Forte applications across the listed model years.

What It Helps Address

• No-crank condition when the transmission is not recognized in Park or Neutral
• Starter engagement concerns tied to range-switch input
• Intermittent starting caused by worn internal switch contacts
• Transmission position signal issues affecting start authorization
• Electrical connection problems at the switch connector or terminals

Installation Notes and Tips

Verify the transmission application and connector style before installation. The switch mounts with bolts and uses an 8-terminal, male-pin configuration with one female rectangular connector. Because mounting hardware and gaskets are not included, reuse or source the required installation components as needed. Confirm proper adjustment and alignment after installation so the vehicle recognizes Park and Neutral correctly.

Quality Assurance

Standard Ignition supplies replacement electrical components for service applications, and NS-623 is built to match the listed fitment and connector specifications for the vehicles shown.